How do I prevent too much liquid in recipes cooked in Crock-Pot?

Take the ribs out of the crock pot, and place them on tin-foil and place them in the oven at about 375*f for about 20 minutes then add a little barbecue sauce, it will then glaze over......Yum or if you want the sauce thicker, place in a fry pan leave lid off allowing liquid to evaporate. while still cooking.